Hiroshi Chikamori is a famous doctor in physical engineering. His one week old daughter Nozomi is abducted at the hospital. Yuri Hayami (Meisa Kuroki) is a detective in a special investigation team. She is also 8 months pregnant. Inspector Himura (Satoshi Jinbo) suddenly summons Yuri and assigns her to observe Nozomi’s mother Yuko (Yumi Adachi) at the hospital. Yuri Hayami goes undercover at the hospital and works with Detective Fukuske Dobashi (Daichi Watanabe) who takes the identity of her husband.

Doctor Susami (Atsuro Watabe) doesn't have an alibi for the time period when the baby was kidnapped. Yuri suspects Doctor Susami. Meanwhile, the kidnapper calls and reveals a ransom demand.